Harsh Metalloys is a well-respected manufacturer and supplier of Stainless Steel 17-4 PH Fasteners, located in Mumbai, India. This type of steel, known as 17-4 PH (UNS S17400), is a precipitation-hardening martensitic stainless steel that stands out for its remarkable mechanical strength, hardness, and resistance to corrosion. These fasteners are commonly used in high-demand applications that need both strength and moderate corrosion resistance, even in environments reaching up to 600°F (316°C). Harsh Metalloys provides a wide variety of 17-4 PH fasteners—including bolts, nuts, screws, studs, and washers—in different sizes and finishes, all crafted to meet international standards like ASTM A564, making them ideal for industries such as aerospace, marine, and petrochemical.
Stainless Steel 17-4 PH Fasteners are made up of about 15–17.5% chromium, 3–5% nickel, 3–5% copper, and a touch of niobium (also known as columbium), with the rest being iron. These fasteners can reach impressive tensile strengths of up to 1100 MPa and yield strengths around 1000 MPa, showcasing remarkable hardness and toughness when properly heat-treated (between H900 and H1150). The 17-4 PH alloy strikes a great balance between high mechanical performance and solid corrosion resistance, making it ideal for use in mild chemical, marine, and atmospheric conditions. Plus, they’re magnetic and perfect for applications that require high stress and resistance to fatigue.
| Specifications | ASTM A 193 / ASME SA 193 |
| Standard | DIN, ISO ,JIS ,GB, IS, BS, ASTM and all International Standards |
| Size | M3 – M100 | 3/6″ – 4″ | Custom Sizes |
| Fasteners Length | 3 mm – 200 mm | Custom Sizes |
| Nuts Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Washers Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Dimensions | DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3 |
| Threads available | UNF, BSW, BSF, METRIC, UNC, or as required |
| Threads Configuration | ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
| Form | Hex, Threading, Square, Round as per Gauge Etc. |
| Head | Hex, Square, Round, Hex flange, Flat, T-head & Triangular etc. |
| Neck type | Hex, Square, Triangular, Oval & Knurled etc. |
| Surface Coating | Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request |
| Manufacturing Process | Wire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing. |
| Grade | C | Cb+Ta | Cr | Cu | Fe | Mn | Ni | P | S | Si |
| SS 17-4 PH | 0.07 max | 0.15-0.45 | 15.00-17.50 | 3.00-5.00 | Bal | 1.0 max | 3.0-5.0 | 0.40 max | 0.03 max | 1.0 max |
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Stainless Steel 17-4 PH Nuts Known for excellent corrosion resistance, Stainless Steel 17-4 PH nuts are typically used in aerospace and industrial applications. They come in various sizes. Usually, the dimensions are M2 to M36 and conform to standard nut sizes.
17-4 PH stud bolts are ideal for high-stress environments and offer high corrosion resistance. Depending on application requirements, they are available in sizes ranging from M4 to M30, with lengths varying from 20mm to 1000mm.
These bolts provide strong corrosion resistance and are commonly used in structural applications. Available in sizes from M5 to M36, with standard lengths ranging from 10mm to 200mm, they meet various industrial and military standards.
Stainless Steel 17-4 PH threaded rods Known for excellent corrosion resistance, 17-4 PH threaded rods are used in high-strength applications. They are available in diameters from M6 to M36 and lengths from 100mm to 3000mm, suitable for various structural needs.
Offering high corrosion resistance, 17-4 PH screws are suitable for harsh environments. They come in sizes from M2 to M16, with lengths from 6mm to 100mm, meeting diverse application standards.
These washers are highly corrosion-resistant, making them ideal for marine and aerospace applications. Available in diameters from M3 to M36, they come in various thicknesses to fit different bolt sizes.
Stainless Steel 17-4 PH Fasteners are widely utilized in various applications, including aerospace components, marine hardware, pressure vessels, turbine blades, chemical processing equipment, and systems for handling nuclear waste. Their unique blend of strength, wear resistance, and corrosion resistance makes them perfect for high-load structural assemblies, aircraft fittings, shafts, and offshore platforms. These fasteners excel in both oxidizing and mildly corrosive environments, such as exposure to saltwater. You’ll also find 17-4 PH fasteners in paper mills, food processing plants, and oil & gas infrastructure, where long-lasting performance and resistance to stress corrosion cracking are crucial. Their durability guarantees reliability in critical applications.
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